Display rack



FIG. 1 is a perspective view of a display rack;

FIG. 2 is a left side view thereof;

FIG. 3 is a front view thereof; and,

FIG. 4 is a right side view thereof.

The broken lines are included for purposes of illustration and form no part of the claimed design. 

CLAIM We claim the ornamental design for a display rack, as shown and described. 